package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {







    @Autowired
    ShoppingCartMapper shoppingCartMapper;


    @Autowired
    DishMapper dishMapper;
    @Autowired
    SetmealMapper setmealMapper;

    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        // 1. 判断当前加入购物车的商品是否已经存在
        // 根据用户id dish_id 或者 setmeal_id查询数据库 判断商品是否已经存在
        // select * from shopping_cart where user_id = ? and setmeal_id = ?
        // select * from shopping_cart where user_id = ? and dish_id = ? and dish_flavor

        ShoppingCart shoppingCart = new ShoppingCart();

        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if(list!=null && list.size()>0){
            // 2. 如果存在 数量加1
            ShoppingCart cart = list.get(0);
            cart.setNumber(cart.getNumber()+1);
            shoppingCartMapper.updateNumberById(cart);
        }
        else{
            // 3. 不存在 插入数据库

            Long dishId = shoppingCartDTO.getDishId();
            Long setmealId = shoppingCartDTO.getSetmealId();
            if(dishId!=null) {
                // 添加到购物车的是菜品
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
                shoppingCart.setNumber(1);
                shoppingCart.setCreateTime(LocalDateTime.now());
            }else{
                // 添加到购物车的是套餐
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
                shoppingCart.setNumber(1);
                shoppingCart.setCreateTime(LocalDateTime.now());


            }
            // 插入数据库
            shoppingCartMapper.insert(shoppingCart);



        }




    }


    public List<ShoppingCart> showShoppingCart() {

        Long userid = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder().id(userid).build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);


        return list;
    }


    public void cleanShoppingCart() {
        Long userid = BaseContext.getCurrentId();

        shoppingCartMapper.deleteByUserId(userid);


    }


}
